US8734068B2 - Cutting tool with unequal flute spacing - Google Patents
Cutting tool with unequal flute spacing Download PDFInfo
- Publication number
- US8734068B2 US8734068B2 US12/852,756 US85275610A US8734068B2 US 8734068 B2 US8734068 B2 US 8734068B2 US 85275610 A US85275610 A US 85275610A US 8734068 B2 US8734068 B2 US 8734068B2
- Authority
- US
- United States
- Prior art keywords
- cutting edge
- flute
- degrees
- margin
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/20—Number of cutting edges
- B23B2251/202—Three cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/28—Arrangement of teeth
- B23B2251/282—Unequal spacing of cutting edges in the circumferential direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Definitions
- the present invention relates to a cutting tool and, more particularly, relates to a cutting tool, such as a drill, with unequal flute spacing.
- a cutting tool such as a drill or twist drill, is generally comprised of a cylindrical shaft having at least one flute and land, which follow a helical angle to a forward cutting edge at the forward end of the shaft.
- the land has associated with it a margin and a clearance portion behind the margin.
- a side cutting edge is defined by the intersection of the flute with the margin of the land.
- This symmetrical distribution has the further disadvantage that the vibrations of the drill that cause the “chatter” recur periodically during the drilling process.
- This periodic recurrence of the vibrations causes an increase in the amplitude of the vibrations, i.e. a “build-up” of the chatter during the drilling process.
- the result is that the irregularities in the side walls of the hole which is being bored, which irregularities are also called ““chatter marks”” increase, resulting in a deterioration in the quality of the boring over the length of the drilling process.
- the minor cutting edges of the drill that are present on the drill periphery can be provided with lands. These lands are generally snug up against the inside wall of the boring and act on the drill in the manner of support fins.
- the '603 patent and the '268 patent publication describe that an additional measure to prevent the untrue running of the drill is the asymmetrical arrangement of the chip flutes and correspondingly of the drill cutting edges.
- the present invention has been developed in view of the foregoing.
- An aspect of the present invention is to provide a cutting tool having a shaft with a longitudinal axis, wherein the cutting tool includes a first flute extending about the longitudinal shaft along a helix angle and a first cutting edge adjacent the first flute.
- the cutting tool also includes a second flute extending about the longitudinal shaft along a helix angle and a second cutting edge adjacent a second flute.
- the cutting tool further includes a third flute extending about the longitudinal shaft along a helix angle and a third cutting edge adjacent the third flute. The first cutting edge, the second cutting edge, and the third cutting edge are unequally angularly spaced from each other.
- Another aspect of the present invention is to provide a cutting tool having a shaft with a longitudinal axis, wherein the cutting tool includes a first flute extending about the longitudinal shaft along a helix angle and a first land adjacent to the first flute and extending about the longitudinal axis of the shaft along the helix angle, wherein the first land has a first margin.
- the cutting tool also includes a second flute extending about the longitudinal shaft along a helix angle and a second land adjacent to the second flute and extending about the longitudinal axis of the shaft along the helix angle, wherein the second land has a second margin.
- the cutting tool further includes a third flute extending about the longitudinal shaft along a helix angle and a third land adjacent to the third flute and extending about the longitudinal axis of the shaft along the helix angle, wherein the third land has a third margin.
- the first margin, the second margin, and the third margin have unequal peripheral dimensions.
- FIG. 1 is a side elevational view of a cutting tool, in accordance with an aspect of the invention.
- FIG. 2 is a section view taken along line 2 - 2 of FIG. 1 , in accordance with an aspect of the invention.
- FIG. 3 is a resultant force diagram of the cutting tool shown in FIGS. 1 and 2 , in accordance with an aspect of the invention.
- the invention is directed to a cutting tool having a helical flute.
- a twist drill will be described herein with the understanding that the invention is applicable to other cutting tools having helical flutes, such as, for example, taps and reamers.
- a cutting tool 10 which, for purposes of description herein, will be referred to as a twist drill, having a shaft 15 with a longitudinal axis 20 .
- the shaft 15 has a forward end 25 capable of contacting and cutting a work piece (not shown).
- a shank 29 At a rearward end 27 of the shaft 15 is a shank 29 , which may be generally cylindrical, or may have a non-cylindrical shape to fit within a chuck (not shown). While the shank 29 is illustrated as cylindrical, it should be appreciated that the shank 29 may have other shapes such as, for example, square, hexagonal, conical, or any other suitable non-cylindrical shape for gripping within a chuck.
- the shaft 15 has an external surface 30 having formed therein a first flute 32 with a corresponding first land 34 , a second flute 36 with a corresponding second land 38 , and a third flute 40 having a corresponding third land 42 .
- Each land extends about the longitudinal axis 20 along a helix angle HA (shown in FIG. 1 ).
- the first land 34 includes a first margin 44 and a corresponding clearance portion 46 .
- the second land 38 has a second margin 48 and a corresponding clearance portion 50 .
- the third land 42 has a third margin 52 and a corresponding clearance portion 54 .
- first cutting edge 56 Adjacent to the first flute 32 is a first cutting edge 56 .
- second cutting edge 58 Adjacent to the third flute 40 is a third cutting edge 60 .
- first cutting edge 56 , the second cutting edge 58 , and the third cutting edge 60 all originate at a center cutting point CP wherein the center cutting point CP is positioned adjacent to the forward end 25 of the shaft 15 (see FIG. 3 ).
- the first cutting edge 56 , the second edge cutting edge 58 , and the third cutting edge 60 are unequally angularly spaced from each other. More specifically, as shown in FIG. 2 , the first cutting edge 56 is angularly spaced from the second cutting edge 58 at an angle A, the second cutting edge 58 is angularly spaced from the third cutting edge 60 at an angle B, and the third cutting edge 60 is angularly spaced from the first cutting edge 56 at an angle C.
- the problem associated with drill bits described herein regarding “chatter” may be minimized, as will be explained in more detail herein.
- angle A may be in the range of about 100 degrees to about 115 degrees.
- Angle B may be in the range of about 110 degrees to about 125 degrees.
- Angle C may be in the range of about 125 degrees to about 140 degrees.
- angle A equals 108 degrees
- angle B equals 118 degrees
- angle C equals 134 degrees.
- the first margin 44 , the second margin 48 , and the third margin 52 all have unequal peripheral dimensions. More specifically, as shown in FIG. 2 the first margin 44 has a peripheral dimension corresponding to an angle D, as indicated by arrow D.
- the second margin 48 has a peripheral dimension corresponding to an angle E, as indicated by arrow E.
- the third margin 52 has a peripheral dimension corresponding to an angle F, as indicated by arrow F.
- peripheral dimension means an arc length for margins 44 , 48 and 52 that is calculated based on a corresponding angle. Providing the margins to have unequal peripheral dimensions further contributes to reducing the described problem of chatter in drill bits.
- the angle D may be in the range of about 4.0 degrees to about 10.0 degrees.
- the angle E may be in the range of about 0.2 degrees to about 8.0 degrees.
- the angle F may be in the range of about 12.0 degrees to about 20.0 degrees.
- the angle D is 5.0 degrees the angle E is 2.0 degrees and the angle F is 15.0 degrees.
- FIG. 3 is a resultant force diagram for the cutting tool 10 , e.g., the drill bit, in accordance with an aspect of the invention.
- the cutting tool 10 e.g., the drill bit
- FIG. 3 is a resultant force diagram for the cutting tool 10 , e.g., the drill bit, in accordance with an aspect of the invention.
- various representative force vectors are displayed along each cutting edge ( 56 , 58 , 60 ) are displayed various representative force vectors. These vectors change in magnitude (indicated by their length and radius of inscribed circle where larger length and radius equals greater magnitude) based on their distance from the center cutting point CP, and therefore are related to their respective cutting velocity.
- the direction of these vectors in the diagram is determined by being constructed tangent to the direction of velocity of the cutting edge at the point at which they are displayed. Placing these representative force vectors “head-to-tail” in the method of a classic force analysis results in the chain of vectors V shown originating from center CP.
- margin 44 also acts in support of margin 52 to actively engage in contact with the hole wall and, as it is positioned along a third cutting edge and allows a higher feedrate to be achieved.
Abstract
Description
Claims (7)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/852,756 US8734068B2 (en) | 2010-08-09 | 2010-08-09 | Cutting tool with unequal flute spacing |
DE112011102673.0T DE112011102673B4 (en) | 2010-08-09 | 2011-06-08 | Cutting tool with unequal groove spacing |
PCT/US2011/039570 WO2012021211A2 (en) | 2010-08-09 | 2011-06-08 | Cutting tool with unequal flute spacing |
CN201180038420.3A CN103052458B (en) | 2010-08-09 | 2011-06-08 | With the cutting tool of unequal separation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/852,756 US8734068B2 (en) | 2010-08-09 | 2010-08-09 | Cutting tool with unequal flute spacing |
Publications (2)
Publication Number | Publication Date |
---|---|
US20120034043A1 US20120034043A1 (en) | 2012-02-09 |
US8734068B2 true US8734068B2 (en) | 2014-05-27 |
Family
ID=45556280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/852,756 Active 2032-12-11 US8734068B2 (en) | 2010-08-09 | 2010-08-09 | Cutting tool with unequal flute spacing |
Country Status (4)
Country | Link |
---|---|
US (1) | US8734068B2 (en) |
CN (1) | CN103052458B (en) |
DE (1) | DE112011102673B4 (en) |
WO (1) | WO2012021211A2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140037393A1 (en) * | 2010-11-25 | 2014-02-06 | Element Six Limited | Bit for a rotary drill |
US20160082524A1 (en) * | 2013-04-19 | 2016-03-24 | Diager | Cutting tip |
US10195675B2 (en) | 2017-03-02 | 2019-02-05 | Kennametal Inc. | Twist drill with unequal flute spacing and unequal relief angles |
WO2023016865A1 (en) * | 2021-08-13 | 2023-02-16 | Gühring KG | Combination tool |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US8210779B2 (en) * | 2008-10-14 | 2012-07-03 | Kennametal Inc. | Cutting tap and method of making same |
EP2672902B1 (en) * | 2011-02-11 | 2015-11-25 | CPL Holdings Pty Ltd | Drill bit |
BR112016003714B1 (en) * | 2013-08-21 | 2022-03-29 | Michael J. Scianamblo | BONE PUNCH |
WO2015075127A1 (en) * | 2013-11-20 | 2015-05-28 | MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG | Conical countersink |
JP1568741S (en) * | 2016-09-09 | 2017-02-06 | ||
IL249676B (en) | 2016-12-20 | 2021-08-31 | Hanita Metal Works Ltd | End mills having differential twisted gash profiles |
DE102017208017B4 (en) | 2017-05-11 | 2019-02-21 | MAPAL Fabrik für Präzisionswerkzeuge Dr. Kress KG | Multi-bladed reamer |
WO2019047433A1 (en) * | 2017-09-08 | 2019-03-14 | 浙江欣兴工具有限公司 | Rotary cutting tool with replaceable bit and rotary cutting method thereof, and bit installation method |
CN107442818A (en) * | 2017-09-21 | 2017-12-08 | 张家港钻通设备有限公司 | A kind of High-strength drill bit |
USD878437S1 (en) * | 2018-08-06 | 2020-03-17 | Peter L. Bono | Helical fluted forward and reverse rotation cutting tool |
USD878438S1 (en) * | 2018-08-06 | 2020-03-17 | Peter L. Bono | Helical fluted forward and reverse rotation cutting tool |
DE102019200829A1 (en) * | 2019-01-24 | 2020-07-30 | Audi Ag | Rotation tool to create a honey entrance |
EP4329973A1 (en) * | 2021-04-30 | 2024-03-06 | Kyocera SGS Precision Tools, Inc. | Constant lead barrel tooling |
US11865629B2 (en) | 2021-11-04 | 2024-01-09 | Kennametal Inc. | Rotary cutting tool with high ramp angle capability |
Citations (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2391396A (en) * | 1942-04-27 | 1945-12-25 | John S Denison | Drill |
US2795979A (en) * | 1954-07-14 | 1957-06-18 | Gen Motors Corp | Chatterless countersink cutter |
US3182531A (en) | 1961-08-04 | 1965-05-11 | Production Engineering Res Ass | Melton mowbray |
US3645642A (en) | 1970-03-10 | 1972-02-29 | George Koslow | Taper drill |
US3706504A (en) | 1970-07-29 | 1972-12-19 | Louis Simonffy | Spiral drill having unequal cutting faces |
DE2553035A1 (en) * | 1975-11-26 | 1977-06-02 | Benz Gmbh Werkzeug Und Maschin | CORE DRILLING TOOL |
US4662803A (en) | 1979-10-18 | 1987-05-05 | Rockwell International Corporation | Reamer with unequally spaced flutes |
US4740121A (en) * | 1979-10-18 | 1988-04-26 | Rockwell International Corporation | Reamer with unequally spaced flutes |
JPS642815A (en) * | 1987-06-23 | 1989-01-06 | G N Tool Kk | Reamer provided with nick |
EP0330107A1 (en) * | 1988-02-24 | 1989-08-30 | Helmut Dipl.-Ing. Krauss | Boring or reaming tool |
US4913603A (en) | 1986-11-25 | 1990-04-03 | Sphinzwerke Muller AG | Spiral drill |
US5282705A (en) * | 1992-07-28 | 1994-02-01 | Fuji Seiko Corporation | Burnishing drill |
US5636948A (en) | 1995-05-04 | 1997-06-10 | Fullerton Tool Company, Inc. | Drill for synthetic fiber filled plastic and like materials |
US5704740A (en) | 1995-06-26 | 1998-01-06 | Walter Ag | Drilling tool, particularly for metallic materials |
US5876155A (en) | 1997-05-15 | 1999-03-02 | Ford Global Technologies, Inc. | Method of eliminating chatter in plunge cutting with cutters at different diameters and depths |
US5967712A (en) | 1998-11-03 | 1999-10-19 | Kennametal Inc. | Cutting tool for machining bores in materials having spring-back |
JP2002103123A (en) | 2000-09-25 | 2002-04-09 | Hitachi Tool Engineering Ltd | Twist drill |
US6379090B1 (en) | 2000-06-30 | 2002-04-30 | The Boeing Company | Force balanced irregular pitch reamer and associated reaming method |
US20020090273A1 (en) | 2001-01-10 | 2002-07-11 | Serwa Ronald K. | Roughing and finishing rotary tool apparatus and method |
US6419488B1 (en) | 1995-12-11 | 2002-07-16 | Ormco Corporation | Endodontic instrument having a chisel tip |
US6431962B1 (en) | 2000-10-05 | 2002-08-13 | Kennametal Inc. | Method and apparatus for making a cutting tool having a flute |
JP2002301616A (en) * | 2001-04-04 | 2002-10-15 | Omi Kogyo Co Ltd | Burnishing drill |
US6602029B1 (en) | 2000-10-05 | 2003-08-05 | Kennametal Inc. | Cutting tool and method and apparatus for making the same |
US6698981B1 (en) | 1999-07-14 | 2004-03-02 | Seco Tools Ab | Drill bit with three cutting edges |
US6739809B2 (en) | 2001-09-19 | 2004-05-25 | Kennametal Inc. | Cutting point for a drill |
US20040120777A1 (en) | 2002-12-24 | 2004-06-24 | Noland Dennis L. | Rotary cutting tool |
US6830502B2 (en) | 2000-03-01 | 2004-12-14 | Dihart Ag | Reaming tool with a guide shank |
WO2005061164A1 (en) * | 2003-12-12 | 2005-07-07 | Guehring Joerg | Secondary cutting edge chamfer |
EP1561535A1 (en) * | 2004-02-06 | 2005-08-10 | Ford Global Technologies, LLC | Cutting tool and method for using said cutting tool |
US20060115339A1 (en) * | 2004-12-01 | 2006-06-01 | Union Tool Co. | Drill |
US7094056B2 (en) | 2003-05-01 | 2006-08-22 | Scianamblo Michael J | Endodontic instrument having reversed helix |
US7207752B2 (en) | 2004-02-03 | 2007-04-24 | Star Cutter Company | Reamer and method for reaming |
WO2008001412A1 (en) | 2006-06-23 | 2008-01-03 | Osg Corporation | Drill |
US7399146B2 (en) | 2003-09-29 | 2008-07-15 | Kennametal Inc. | Rotary cutting tool having irregular insert orientation |
US20080199268A1 (en) * | 2006-05-31 | 2008-08-21 | Krenzer Ulrich F | Drilling tool |
JP2009039811A (en) * | 2007-08-08 | 2009-02-26 | Kumamoto Univ | Tool and method for drilling hole in fiber-reinforced composite material |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE576265C (en) * | 1933-05-09 | G & H Doerken Werkzeugfabrik | Three-edged long hole drill | |
DE60025810T2 (en) * | 2000-03-15 | 2006-11-02 | Kabushiki Kaisha Miyanaga, Miki | DRILL |
CN201405114Y (en) * | 2009-05-20 | 2010-02-17 | 住研精密刀具(武汉)有限公司 | End milling cutter with unequal helical angles |
CN201427201Y (en) * | 2009-07-08 | 2010-03-24 | 西安工业大学 | Spiral groove-shaped expanding drill |
-
2010
- 2010-08-09 US US12/852,756 patent/US8734068B2/en active Active
-
2011
- 2011-06-08 WO PCT/US2011/039570 patent/WO2012021211A2/en active Application Filing
- 2011-06-08 DE DE112011102673.0T patent/DE112011102673B4/en active Active
- 2011-06-08 CN CN201180038420.3A patent/CN103052458B/en active Active
Patent Citations (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2391396A (en) * | 1942-04-27 | 1945-12-25 | John S Denison | Drill |
US2795979A (en) * | 1954-07-14 | 1957-06-18 | Gen Motors Corp | Chatterless countersink cutter |
US3182531A (en) | 1961-08-04 | 1965-05-11 | Production Engineering Res Ass | Melton mowbray |
US3645642A (en) | 1970-03-10 | 1972-02-29 | George Koslow | Taper drill |
US3706504A (en) | 1970-07-29 | 1972-12-19 | Louis Simonffy | Spiral drill having unequal cutting faces |
DE2553035A1 (en) * | 1975-11-26 | 1977-06-02 | Benz Gmbh Werkzeug Und Maschin | CORE DRILLING TOOL |
US4662803A (en) | 1979-10-18 | 1987-05-05 | Rockwell International Corporation | Reamer with unequally spaced flutes |
US4740121A (en) * | 1979-10-18 | 1988-04-26 | Rockwell International Corporation | Reamer with unequally spaced flutes |
US4913603A (en) | 1986-11-25 | 1990-04-03 | Sphinzwerke Muller AG | Spiral drill |
JPS642815A (en) * | 1987-06-23 | 1989-01-06 | G N Tool Kk | Reamer provided with nick |
EP0330107A1 (en) * | 1988-02-24 | 1989-08-30 | Helmut Dipl.-Ing. Krauss | Boring or reaming tool |
US5282705A (en) * | 1992-07-28 | 1994-02-01 | Fuji Seiko Corporation | Burnishing drill |
US5636948A (en) | 1995-05-04 | 1997-06-10 | Fullerton Tool Company, Inc. | Drill for synthetic fiber filled plastic and like materials |
US5704740A (en) | 1995-06-26 | 1998-01-06 | Walter Ag | Drilling tool, particularly for metallic materials |
US6419488B1 (en) | 1995-12-11 | 2002-07-16 | Ormco Corporation | Endodontic instrument having a chisel tip |
US5876155A (en) | 1997-05-15 | 1999-03-02 | Ford Global Technologies, Inc. | Method of eliminating chatter in plunge cutting with cutters at different diameters and depths |
US5967712A (en) | 1998-11-03 | 1999-10-19 | Kennametal Inc. | Cutting tool for machining bores in materials having spring-back |
US6698981B1 (en) | 1999-07-14 | 2004-03-02 | Seco Tools Ab | Drill bit with three cutting edges |
US6830502B2 (en) | 2000-03-01 | 2004-12-14 | Dihart Ag | Reaming tool with a guide shank |
US6379090B1 (en) | 2000-06-30 | 2002-04-30 | The Boeing Company | Force balanced irregular pitch reamer and associated reaming method |
JP2002103123A (en) | 2000-09-25 | 2002-04-09 | Hitachi Tool Engineering Ltd | Twist drill |
US6431962B1 (en) | 2000-10-05 | 2002-08-13 | Kennametal Inc. | Method and apparatus for making a cutting tool having a flute |
US6602029B1 (en) | 2000-10-05 | 2003-08-05 | Kennametal Inc. | Cutting tool and method and apparatus for making the same |
US20020090273A1 (en) | 2001-01-10 | 2002-07-11 | Serwa Ronald K. | Roughing and finishing rotary tool apparatus and method |
JP2002301616A (en) * | 2001-04-04 | 2002-10-15 | Omi Kogyo Co Ltd | Burnishing drill |
US6739809B2 (en) | 2001-09-19 | 2004-05-25 | Kennametal Inc. | Cutting point for a drill |
US20040120777A1 (en) | 2002-12-24 | 2004-06-24 | Noland Dennis L. | Rotary cutting tool |
US7094056B2 (en) | 2003-05-01 | 2006-08-22 | Scianamblo Michael J | Endodontic instrument having reversed helix |
US7399146B2 (en) | 2003-09-29 | 2008-07-15 | Kennametal Inc. | Rotary cutting tool having irregular insert orientation |
WO2005061164A1 (en) * | 2003-12-12 | 2005-07-07 | Guehring Joerg | Secondary cutting edge chamfer |
US7207752B2 (en) | 2004-02-03 | 2007-04-24 | Star Cutter Company | Reamer and method for reaming |
EP1561535A1 (en) * | 2004-02-06 | 2005-08-10 | Ford Global Technologies, LLC | Cutting tool and method for using said cutting tool |
US20060115339A1 (en) * | 2004-12-01 | 2006-06-01 | Union Tool Co. | Drill |
US20080199268A1 (en) * | 2006-05-31 | 2008-08-21 | Krenzer Ulrich F | Drilling tool |
WO2008001412A1 (en) | 2006-06-23 | 2008-01-03 | Osg Corporation | Drill |
JP2009039811A (en) * | 2007-08-08 | 2009-02-26 | Kumamoto Univ | Tool and method for drilling hole in fiber-reinforced composite material |
Non-Patent Citations (1)
Title |
---|
Korean Intellectual Property Office, International Search Report for International Application No. PCT/US2011/039570, dated Feb. 2, 2012. |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140037393A1 (en) * | 2010-11-25 | 2014-02-06 | Element Six Limited | Bit for a rotary drill |
US9724763B2 (en) * | 2010-11-25 | 2017-08-08 | Element Six Limited | Bit for a rotary drill |
US20160082524A1 (en) * | 2013-04-19 | 2016-03-24 | Diager | Cutting tip |
US10183342B2 (en) * | 2013-04-19 | 2019-01-22 | Diager | Cutting tip |
US10195675B2 (en) | 2017-03-02 | 2019-02-05 | Kennametal Inc. | Twist drill with unequal flute spacing and unequal relief angles |
DE102018102635B4 (en) | 2017-03-02 | 2023-06-15 | Kennametal Inc. | TWIST DRILLS WITH AN UNEQUAL FLUTE SPACING AND UNEQUAL CLEARANCE ANGLE |
WO2023016865A1 (en) * | 2021-08-13 | 2023-02-16 | Gühring KG | Combination tool |
Also Published As
Publication number | Publication date |
---|---|
DE112011102673T5 (en) | 2013-06-27 |
CN103052458B (en) | 2016-03-09 |
WO2012021211A3 (en) | 2012-04-05 |
WO2012021211A2 (en) | 2012-02-16 |
DE112011102673B4 (en) | 2021-06-24 |
CN103052458A (en) | 2013-04-17 |
US20120034043A1 (en) | 2012-02-09 |
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